Home > CompTIA A+ Exam > Quizzes > Current Electricity
Current Electricity
Fast practice, instant feedback. Timer auto-submits when time’s up.
Avg score: 33% • Most missed: “Cell having an emf ε and internal resistance r isconnected across a variable ex…”
Current Electricity
Time left 00:00
25 Questions

1. The masses of the three wires of copper are inthe ratio of 1: 3: 5 and their lengths are in the ratio of 5:3:The ratio of their electrical resistance is [1988]
2. If the resistance of a conductor is 5 Ω at 50°C and 7Ω at 100°C - then the mean temperature coefficient ofresistance (of the material) is [1996]
3. If specific resistance of a potentiometer wire is 10 -“7 Ω m - the current flow through it is 0.1 A and the crosssectional area of wire is 10 -“6 m2 then potential gradientwill be [2001]
4. A galvanometer of resistance 50 Ω is connected tobattery of 3V along with a resistance of 2950 Ω in series.A full scale deflection of 30 divisions is obtained in thegalvanometerIn order to reduce this deflection to 20divisions - the resistance in series should be [2008]
5. If nearly 10 5 coulombs liberate 1 gm-equivalent ofaluminium - then the amount of aluminium (equivalentweight 9) - deposited through electrolysis in 20 minutesby a current of 50 ampwill be [1998]
6. Resistances n - each of r ohm - when connected inparallel give an equivalent resistance of RohmIf theseresistances were connected in series - the combinationwould have a resistance in ohms - equal to [2004]
7. A 6 volt battery is connected to the terminals of thethree metre long wire of uniform thickness andresistance of 100 ohmThe difference of potentialbetween two points on the wire separated by a distanceof 50 cm will be [2004]
8. A battery of 10 V and internal resistance0.5 Ω isconnected across a variable resistance RThe value of Rfor which the power delivered is maximum is equal to[1992 - 2001]
9. In producing chlorine by electrolysis 100 kWpower at 125 Vis being consumedHow much chlorineper minute is liberated? (E.C.Eof chlorine is 0.367×10 -“6kg/ C) [2010]
10. A cell can be balanced against 110 cm and 100 cmof potentiometer wire - respectively with and withoutbeing short circuited through a resistance of 10 ΩItsinternal resistance is [2008]
11. Three resistances each of 4: are connected to forma triangleThe resistance between any two terminals is[1993]
12. If 25W - 220 V and 100 W - 220 V bulbs areconnected in series across a 440 V line - then [2001]
13. When a wire of uniform cross-“section a - length land resistance R is bent into a complete circle - resistancebetween any two of diametrically opposite points will be[2005]
14. Fuse wire is a wire of [2003]
15. A 5-“ampere fuse wire can withstand a maximumpower of 1 watt in the circuitThe resistance of the fusewire is [2005]
16. The resistance of an ammeter is 13 Ω and its scaleis graduated for a current upto 100 ampsAfter anadditional shunt has been connected to this ammeter itbecomes possible to measure currents upto 750amperes by this meterThe value of shunt-resistance is[2007]
17. Si and Cu are cooled to a temperature of 300 K - then resistivity? [2001]
18. The resistivity (specific resistance) of a copperwire [2002]
19. If voltage across a bulb rated 220 Volt-100 Wattdrops by 2.5% of its rated value - the percentage of therated value by which the power would decrease is :[2012]
20. Three resistances P - Q - Reach of 2Ω and anunknown resistance S form the four arms of aWheatstone bridge circuitWhen a resistance of 6Ω isconnected in parallel to S the bridge gets balancedWhatis the value of S? [2007]
21. In electrolysis - the amount of mass deposited orliberated at an electrode is directly proportional to[2000]
22. Two electric bulbs - one of 200 V - 40Wand other of200 V - 100 W are connected in a domestic circuitThen[2000]
23. The velocity of charge carriers of current (about 1amp) in a metal under normal conditions is of the orderof [1991]
24. An electric kettle has two heating coilsWhen oneof the coils is connected to an a.csource - the water inthe kettle boils in 10 minutesWhen the other coil isused - the water boils in 40 minutesIf both the coils areconnected in parallel - the time taken by the samequantity of water to boil will be [2003]
25. A wire of resistance 4 Ω is stretched to twice itsoriginal lengthThe resistance of stretched wire wouldbe [NEET2013]

⚡ Recently practiced quizzes in this topic
Live quiz activity
Comptia A+ Port Numbers CompTIA A+ Windows Command Line A+ Guide To IT Technical Support Glossary CompTIA A+ Certification 802 Exam Practice CompTIA A+ 220-801 Exam A+ Guide To IT Technical Support - Network Hardware CompTIA A+ 220-901 Exam Practice Questions CompTIA A+ 220-901 Practice Questions Comptia A+ 220-902 Exam Terms A+ Guide To IT Technical Support - Hard Drives and Other Storage Devices
 
❤ If you liked Fatskills, consider supporting us by checking out The Life Manuals You Never Got.

🌈  Our mission is to help improve your scores in any subject and exam withonline quizzes, practice tests, study guides, & advice for students. Since 2018.
About | Explore | User Guide | Topics | Subjects | Doubt Solver | Career Aptitude Test | Answers | Free Tools | What Should We Know?
Privacy | Terms |
Without work one finishes nothing. - Ralph Waldo Emerson
© 2026 Fatskills.com

All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.